Abstract: A system comprising a tubing encased conductor (TEC), a transformer inductively coupled to the TEC, and a wireless downhole device coupled to the transformer. The wireless downhole device may include a transceiver configured to receive and/or transmit, from the transformer, a digital signal encoded in a variable current in the TEC. The digital signal may correspond to a command. In some aspects, the wireless downhole device may be powered via the transformer, a battery, or a turbine.

Abstract: A technique facilitates application of increased force on a downhole tool, such as a shifting tool. According to an embodiment, a shifting tool is sized for deployment along the interior of a well string to enable shifting of a sliding sleeve. The shifting tool comprises a plurality of keys which are movably mounted for actuation between a contracted position and an extended position engaging the sliding sleeve. A plurality of pads may be actuated with the plurality of keys so as to form a flow restriction between the shifting tool and the surrounding well string. As a result, fluid pumped down between the shifting tool and the well string establishes a pressure differential across the flow restriction which helps move the shifting tool and the sliding sleeve to a desired position.

Abstract: A concentration of at least one chemical reaction product in a drilling fluid is determined after the drilling fluid has interacted with a plasma discharge produced via one or more electrodes of a drill bit of a pulse power drill string disposed in a wellbore for drilling the borehole. The concentration of the at least one chemical reaction product is correlated to a relation between an arc and a spark of the plasma discharge. The relation between the arc and spark can subsequently be evaluated to determine updates to pulse power drilling parameters and/or to perform formation and drilling fluid evaluation.

Abstract: End cap assemblies for retaining the through-pin of a tandem sub are disclosed. An electrical contact attachment is attached or mounted to an end cap, having an opening for receiving the through-pin, and one or more pin contact tabs in the opening. The contact attachment also includes an aperture for passing a first wire therethrough, and an insert for securing an electrically conductive wire to the electrical contact attachment itself.

Abstract: A milling system may be used to remove the portions of a failed valve that is blocking the wellbore. When milling a partially open valve obstructing the wellbore, the target material to be removed may not be present at the central axis of the wellbore causing the target material to not fully surround the milling bit, which may cause the bit to be deflected away from the target during milling reducing milling efficiency. The disclosed milling system may be used to mill out and capture the coupon for any downhole obstruction that does not have any material near the center axis of the wellbore. A first embodiment of the milling system may be configured to fully mill out material within the wellbore while a second embodiment may be used to mill out material within the wellbore and further catch the milled material or coupon.

Abstract: A frangible disk sub including a housing, a break mechanism disposed in the housing a carrier movably disposed in the housing, a frangible disk supported by the carrier and movable with the carrier into contact with the break mechanism, and a release mechanism restraining movement of the carrier until a threshold load is exceeded. A method for rupturing a frangible disk including exceeding a threshold load with on the sub, releasing the release mechanism, moving the carrier and the frangible disk toward and into contact with the break mechanism, and rupturing the frangible disk with the break mechanism. A borehole system including a borehole in a subsurface formation, a string in the borehole, and a frangible disk sub disposed within or as a part of the string.

Abstract: A method and apparatus for containing one or more shaped charges in a single plane, using a shaped charge housing containing a cluster of one or more shaped charges. The cluster contains with the apex ends facing each other, arrayed about the center axis of a gun body, and detonated from a single initiator located in the middle of the cluster of the one or more shaped charges. The shaped charge housing can be one of many shaped charge housings coupled together to perforate in a plurality of single planes.

Abstract: A method for underground mining in a rock body include drilling one or more service boreholes from at least one surface location into a subsurface rock body. A plurality of multilateral blast holes is drilled, branching from at least one of the one or more service boreholes into the subsurface rock body. The plurality of multilateral blast holes are each loaded with one or more explosive charges and one or more detonators. The one or more explosive charges and the one or more detonators are inserted from surface. The one or more explosive charges is detonated wirelessly to fragment the subsurface ore body. Fragmented rock is extracted via the one or more service boreholes, to surface.

Abstract: Systems and methods for drilling a geothermal well can include drilling a vertical borehole to a target location, drilling a plurality of lateral boreholes, each of which is connected to the vertical borehole, and can include generating a plurality of chambers in at least one of the plurality of lateral boreholes. The techniques can include drilling a plurality of passageways that each provide fluid communication between one of the plurality of chambers in a first lateral borehole and a second lateral borehole of the plurality of lateral boreholes. The techniques can form a fluid circuit for injecting a heating fluid such as water or brine and recovering hot water and steam using a single vertical borehole. The hot water and/or steam can be used to generate electrical power with a geothermal power facility.

Abstract: The invention relates to the use of a sleeve (9) installed in a liner or casing (1) prior to a cementing operation. Completion equipment in the liner/casing creates an irregular inner profile which can cause cement to get trapped. A wiper dart (3) passed down the casing/liner (1) may have difficulty removing all residual cement (5). By using a sleeve or insert (8) in the liner/casing (1), a smooth inner profile (9) may be created which can be cleaned relatively easily by a wiper dart. Once cementing and cleaning are complete, the sleeve (9) may be removed by wellbore fluid or acid if it is made from a dissolvable material such as aluminum or magnesium.

Abstract: The invention relates to a chemical composition produced from mixtures of organic chemical compounds, alcohols, inorganic compounds and oxidizing compounds, by combining controlled strong acids, organic bases, oxidizing compounds, alcohols and a mixture of distilled and double-distilled fatty acids, which mixture, through the use of specific controlled pressures and temperatures, can be used for the production, improved recovery and processing of light, medium, heavy and extra-heavy hydrocarbons and bituminous sands at the surface or from a deposit.

Abstract: Methods for electrohydraulic fracture stimulation of formations may include producing an acoustic shock wave having a compressive wave character in a wellbore penetrating a formation and manipulating the acoustic shock wave. The acoustic shock wave may be manipulated in one or more of the following steps: channeling the acoustic shock wave down the wellbore to change a shape of the acoustic shock wave to less spherical; converting the compressive wave character to an expansion wave character; and changing an acoustic impedance of the acoustic shock wave. The acoustic shock wave having the changed shape, the expansion wave character, and the changed acoustic impedance is distributed into the formation.

Abstract: The present disclosure is generally directed to a bottom hole assembly. The bottom hole assembly may include a by-pass valve assembly and a shifting tool assembly positioned downhole from the by-pass valve assembly. The bottom hole assembly may used to hydraulically fracture a wellbore and shift a well tool from a first position to a second position within the wellbore.

Abstract: A method of removing material from a target is described. The method comprises the steps of providing a tool, the tool having at least one propellant source; pressurising the tool to a pressure higher than the environmental pressure; igniting at least one of the propellant source(s) to form a combustion zone; and directing combustion products generated at the combustion zone along at least one tool flow path. The tool flow path(s) is selectively openable or closable, such that upon exiting the tool flow path(s) the combustion products interact with a target, the interaction causing material to be removed from the target.

Abstract: Methods and systems for creating fractures in rock are disclosed herein. In an exemplary method, reactive fluid is delivered into a wellbore. Formation fracture pressure is added to the reactive fluid in the wellbore sufficient to create a fracture network in a formation. The reaction pressure rubblizes the portion of a rock face of the fracture wall face to generate propping rubble that props the fracture open.

Abstract: A method includes placing a fluid in a treatment zone of a wellbore, the fluid in fluid communication with a near wellbore region of a subterranean formation. At least one energetic event generating material is placed in the wellbore, and positioned adjacent and up hole from the fluid. An energetic event is generated from the at least one energetic event generating material, and at least one fracture is formed in the near wellbore region from the at least one energetic event applying a pressure pulse onto the fluid. In some aspects, the fluid is a viscous pill.

Abstract: A perforating gun, system and method is provided. The perforating gun includes a body, a plurality of shaped charges, at least one initial propellant and may include an actuating mechanism. The plurality of shaped charges are mounted within the body, and each shaped charge has an amount of an explosive material. The actuating mechanism is in communication with each shaped charge and the at least one initial propellant. The actuating mechanism is configured to fire the at least one initial propellant before firing any of the plurality of shaped charges.

Abstract: A method of selectively expanding a wall of a tubular includes assembling an expansion tool comprising a plurality of bi-directional boosters, arranging a predetermined number of explosive pellets a serially-arranged column between the bi-directional boosters, positioning a duel end firing explosive column tool within the tubular, and detonating the bi-directional boosters to simultaneously ignite opposing ends of the serially-arranged column to form two shock waves. The shock waves collide to create an amplified shock wave that travels radially outward to impact the tubular and expand a portion of the tubular wall radially outward, without perforating or cutting through the portion of the wall, to form a protrusion of the tubular at the portion of the wall. The protrusion extends into an annulus adjacent an outer surface of the wall of the tubular.

Abstract: A circulation sleeve including a housing, a mandrel disposed at least partially within the housing, the mandrel and the housing together configured to respond to pressure applied to the sleeve from radially outward of the housing by moving the housing to a position relative to the mandrel where a treatment port through a radial wall of the mandrel is exposed outside of the housing and to respond to fluid flow rate within the mandrel to move the housing to a position relative to the mandrel where the treatment port is disposed within the housing.

Abstract: A downhole tool for cleaning and sealing a wellbore includes a wash tool configured at a downhole end of the downhole tool to generate pulses of a first fluid at a first frequency and a first pressure for washing a target interval of a wellbore. The downhole tool further includes a plugging tool configured uphole or downhole from the wash tool to generate pulses of a second fluid at a second frequency and a second pressure for depositing a sealing plug at the target interval of the wellbore. The second fluid has a higher viscosity than the first fluid, the second frequency is lower than the first frequency, and the second pressure is higher than the first pressure.

Abstract: A method involves determining an expansion charge able to selectively expand, without perforating or cutting through, a wall of a tubular in a wellbore. The method includes determining conditions in the wellbore, including hydrostatic pressure bearing on the tubular in the wellbore, and a physical characteristic of the tubular. At a second location other than the wellbore, at least one of the conditions determined in the wellbore is reproduced, and a test tubular is provided at the second location. A test expansion charge able to expand, without perforating or cutting through, the wall of the test tubular, is determined based on the determined conditions. The determined test expansion charge is positioned within the test tubular, and is then actuated to expand the wall of the test tubular radially outward, without perforating or cutting through the wall, to form a test protrusion in the wall of the test tubular.

Abstract: A method of selectively expanding a wall of a tubular includes assembling an expansion tool comprising a plurality of bi-directional boosters, arranging a predetermined number of explosive pellets a serially-arranged column between the bi-directional boosters, positioning a duel end firing explosive column tool within the tubular, and detonating the bi-directional boosters to simultaneously ignite opposing ends of the serially-arranged column to form two shock waves. The shock waves collide to create an amplified shock wave that travels radially outward to impact the tubular and expand a portion of the tubular wall radially outward, without perforating or cutting through the portion of the wall, to form a protrusion of the tubular at the portion of the wall. The protrusion extends into an annulus adjacent an outer surface of the wall of the tubular.

Abstract: A well tool includes a perforating gun including multiple shaped charges, a sheath encapsulating the perforating gun and powdered acid in an internal chamber defined by the sheath. The perforating gun is lowered to a depth into a wellbore formed in a subterranean zone. The multiple shaped charges are fired to form multiple perforations in the wellbore at the depth. The multiple perforations provide access to the subterranean zone at the depth. The sheath, which covers at least some of the multiple shaped charges, breaks responsive to at least some of the multiple shaped charges being fired. The powdered acid in the internal chamber is applied to the subterranean zone responsive to the multiple shaped charges being fired. The powdered acid reacts with and weakens the subterranean zone at the depth to ease flow of hydraulic fracturing fluid into the subterranean zone at the depth.

Abstract: An anchor for securing a well tool can include a longitudinally extending central axis, an outwardly extendable grip member, and a mechanical linkage including multiple pivotably connected links. The links pivot relative to each other in a plane laterally offset from the central axis. A method of anchoring a well tool can include flowing a fluid through an anchor connected to the well tool, thereby outwardly extending a grip member into contact with a well surface, and applying a tensile force to the anchor, thereby increasingly biasing the grip member against the well surface and securing the well tool relative to the well surface. A method of anchoring a tubing cutter in a tubular string can include applying a tensile force from an anchor to the tubular string, and cutting the tubular string while the tensile force is applied from the anchor to the tubular string.

Abstract: Well production enhancement systems and methods to enhance well production are disclosed. The method includes deploying an outer conveyance into a wellbore, where a plurality of propellants are deployed along a section of the outer conveyance. The method also includes deploying one or more isolation devices to form one or more isolation zones along the outer conveyance. The method further includes deploying an inner conveyance within the outer conveyance, where the inner conveyance is initially deployed along the section of the outer conveyance. The method further includes detonating the plurality of propellants to generate one or more fractures in a formation proximate to the section of the outer conveyance. The method further includes injecting fracture enhancement fluids into the one or more fractures to enhance well production through the one or more fractures.

Abstract: A shaped charge liner having a plurality of metal powders including at least one high purity level metal having a purity level of at least about 99.5%. The metal powders and high purity level metal are compressed to form the shaped charge liner, and the shaped charge liner is for installation in a shaped charge. Once installed in the shaped charge, the shaped charge liner is for being thermally softened so that it has a porosity level of less than about 20 volume % and is able to maintain its mechanical integrity when thermally softened. A shaped charge including such liners is disclosed, as well as a method of perforating a wellbore using such shaped charge having such liners positioned therein.

Abstract: Provided are systems and methods for forming a casing liner in a wellbore of a hydrocarbon well. The forming including disposing a casing liner print head in an annular region located between a casing pipe disposed in a wellbore of a hydrocarbon well and a wall of the wellbore, conducting a downhole lining operation including operating the casing liner print head to eject casing liner integrated structure material into the annular region to form, in the annular region, a casing liner integrated structure including contiguous voids formed in the casing liner integrated structure material, and depositing a cementitious material into the contiguous voids formed in the casing liner material to form, in the annular region, a casing liner including the casing liner integrated structure material and the cementitious material.

Abstract: Provided are systems and methods for forming a casing liner in a wellbore of a hydrocarbon well. The forming including disposing a casing liner print head in an annular region located between a casing pipe disposed in a wellbore of a hydrocarbon well and a wall of the wellbore, and conducting a downhole lining operation including operating the casing liner print head to eject casing liner material into the annular region to form, in the annular region, a casing liner including elongated voids formed in the casing liner material.

Abstract: Energy created by a propellant can form a fracture in a subterranean formation. For example, a treatment fluid can be introduced into a subterranean formation. A propellant can be positioned in the subterranean formation. The propellant can be detonated to generate a fracture in the subterranean formation for receiving at least part of the treatment fluid. The treatment fluid may include an acid, a hydrolysable in-situ acid generator, a chelating agent, a hydrolysable in-situ chelating agent generator, or mixtures thereof.

Abstract: An anchor device having a tubular body with a longitudinal axis, the tubular body being divided into a first body portion and a second body portion which are interconnected by means of a rigid connection so that movement between the first body portion and second body portion is substantially prevented, the anchor device further comprising an actuator having an actuation part which, by operation of the actuator, moves relative to the body, wherein the anchor device further comprises a first linkage set and second linkage set each of which includes at least one linkage, each linkage comprising a first, second and third link, the second link lying between the first and third links, and being pivotally connected to both, each linkage further comprising means to releasably pivotally connect the first link to the first body portion, and means to releasably pivotally connect the third link to the actuation part, the first and third links of each linkage in the first set being shorter than the first and third links o

Abstract: A gun to gun transfer delay fuse that includes a delay housing, a first cylindrical cavity housing a firing pin and igniter, and a second cylindrical cavity housing a delay fuse with a centralizer feature.

Abstract: A propellant container for a perforating gun includes a lower cap, one or more pieces of propellant positioned within the lower cap, wherein at least one of the one or more pieces of propellant defines one or more through-holes, and an upper cap matable with the lower cap to secure the one or more pieces of propellant within the lower cap. A filler material is present within interstitial spaces between the one or more pieces of propellant.

Abstract: Provided are wiper plugs with removable cores and methods of using the wiper plugs with removable cores. An example wiper plug with a removable core comprises a molded body, a wiper, a cavity through the interior of the molded body, a support disposed in the cavity, and the removable core disposed in the cavity. An example method of use comprises removing the core of the wiper plug without drilling through the wiper plug, and leaving the remainder of the wiper plug in the wellbore.

Abstract: A method, system, and apparatus for restraining a firing pin using a bushing for use in a downhole switch that is armed using the explosive energy of a previously detonated shaped charge.

Abstract: Systems and methods for treating subterranean formations for treating subterranean formations using propellant fracturing and hydraulic fracturing to detonate and inject in sequential stages. A method comprises disposing a propellant fracturing tool downhole into a well bore; introducing a fracturing fluid into a work string coupled to the fluid conduit to pressurize and set an upper packer and a lower packer against the well bore; detonating sequentially a plurality of propellant band stages to produce one or more fractures; introducing sequentially a series of treatment fluids into a well bore penetrating at least a portion of a subterranean formation, wherein the sequential introduction of the series of treatment fluids occurs between the sequential detonation of the plurality of propellant band stages; and depositing at least a portion of the treatment fluids in at least a portion of the subterranean formation.

Abstract: Provided is a downhole fracturing tool assembly, and a method for fracturing an oil/gas formation. The downhole fracturing tool assembly, in one aspect, includes a tool body, and a localized fracking system located within the tool body. In accordance with this aspect, the localized fracking system is designed to create a localized initial pulse of pressure sufficient to initiate a fracture of a subterranean zone of interest.

Abstract: An energetic charge for propellant fracturing may include a propellant material or a shape of the energetic charge being selected such that a rise time of a deflagration of the energetic charge is determined to be in the propellant fracturing regime. The propellant fracturing regime may be defined by a set of linear equations associated with the rise time for pressure from the deflagration of the energetic charge. The rise time may be calculated based on an equation {dot over (?)}=(dP/dt)/E, where {dot over (?)} represents a strain rate, dP/dt represents a change in pressure with respect to time, and E is Young's modulus, and where the set of linear equations relate the rise time to a borehole diameter.

Abstract: Embodiments of the present disclosure relate to a cutter tool for cutting tubulars from the inside thereof. The tubulars can be an oil well or a gas well, pipeline or other type of tubular. The cutter tool can include a housing that is insertable within the tubular and a cutting member that is receivable within the housing. The cutting member has a first end and a second end with the first end for cutting the tubular. The tool also includes a first shaft with a first shaft-end and a second shaft-end. The first shaft-end is releasably connectable to the housing. The tool also includes a second shaft that is connectable with the second end of the cutting member. The cutting member is moveable within the housing between a retracted position and an extended-and-cutting position by movement of the second shaft.

Abstract: Components for a perforation gun system are provided including combinations of components including a self-centralizing charge holder system and a bottom connector that can double as a spacer. Any number of spacers can be used with any number of holders for any desired specific metric or imperial shot density, phase and length gun system.

Abstract: A downhole sub for injecting and detonating liquid explosive into a subterranean formation has a first fluid chamber, a second fluid chamber, a piston slidably disposed between and separates the first fluid chamber and the second fluid chamber, and a detonation unit affixed to the piston. It also has a third fluid chamber, a coupling disposed between the second fluid chamber and the third fluid chamber, and an annular sealing device disposed about the downhole sub. During operation, the downhole sub is filled with a liquid explosive and lowered into a well. A hydraulic fluid is injected into the downhole sub to initiate a process in which a portion of the well casing having a plurality of perforations in its wall is isolated from the rest of the well first, the liquid explosive is then injected into the isolated portion, and from there into the surrounding subterranean formation, and finally ignited to create fractures in the formation.

Abstract: A method of creating and finishing perforations in a hydrocarbon well having a well wall that includes causing a high velocity jet of a material to shoot into the well wall, thereby creating a perforation in the well wall. The method further includes introducing a gas blast into the perforation, for a blast time duration, the gas blast creating an increasing pressure at the perforation until a maximum pressure is reached; and allowing the pressure of the gas blast to undergo a period of rapid decline to a level of less than 50% of the maximum pressure.

Abstract: A casing segmentation device and system, and a method for selectively providing a fluid flow passage through a casing segmentation device disposed within a well casing segment is provided. The casing segmentation device includes a body and a fracture mechanism. The body has a forward end, an aft end, a plug seat, and an internal passage. The plug seat is configured to receive a mating plug. The internal passage extends between the forward end and the aft end and through the plug seat. The fracture mechanism includes an amount of energetic material and a trigger mechanism. The trigger mechanism is configured to selectively cause a detonation of the amount of energetic material.

Abstract: A method of controllably disintegrating a downhole article comprises disposing a first article in a downhole environment, the first article being the downhole article to be disintegrated; disposing a second article in the downhole environment after the first article is disposed, the second article carrying a device, a chemical, or a combination comprising at least one of the foregoing; and disintegrating the first article with the device, chemical, or the combination comprising at least one of the foregoing from the second article.

Abstract: A valve device selectively communicates annulus pressure or pressure from a hydraulic circuit to an actuation piston of a borehole tool to directly or indirectly set the borehole tool. A valve member is held against spring bias by a retainer whose physical properties can be remotely changed to release the force of the bias to move the valve member which in turn moves an actuating piston to set the borehole tool. The compressive strength of the material can be impacted by electric current that directly or indirectly such as with the generation of heat results in weakening the retainer. The retainer material may be surrounded with a sleeve to enhance compressive strength until the remote signal is applied such as with wireline or electric line. Other property changes to the retainer are contemplated such as volume change, shape change, change in state or change in tensile or compressive strength.

Abstract: A shaped charge comprising a containment shell, an explosive charge placed in the containment shell and having a V-shaped surface, a fuse placed behind the explosive charge, and a layer of projection material placed in front of the V-shaped surface of the explosive charge. A layer of pyrogenic material is used for heating the projection coating. This pyrogenic material can also be mixed with the explosive charge.

Abstract: An acid block is for local acid treatment of a subsea connecting element, which is in need of cleaning by acid treatment. A block element, which is formed from an acid or an acid residue in solid form, is formed for positioning on or at a portion of the connecting element, for example a connecting interface formed according to an API standard. A method is for acid treatment of a subsea connecting element, which is in need of cleaning by acid treatment.

Abstract: A firing assembly for a wellbore perforating gun or other downhole tool includes: one or more casings connected together to form a firing head containment body, the firing head containment body is in fluid communication with a firing assembly that includes a click pressure firing module that allows the wellbore to be pressurized to high pressures required for pressure testing the well casing one or more times without firing the gun or actuating a certain downhole tool, and after a predetermined number of pressure increase events, allows the subsequent high pressure activation to reach the firing pin or actuation device and fire the gun or activate the tool without further activity from the surface other than applying the pressure.

Abstract: A concentrated solar power (CSP) deliquification system for discouraging the accumulation of liquids in a wellbore includes a CSP heating subsystem, and an injection and recirculation subsystem. A working fluid is heated by the CSP heating subsystem and conveyed down-hole into the wellbore by the injection and recirculation subsystem. Heat is transferred from the working fluid to a production fluid within the wellbore, which facilitates maintenance of the production fluid in a gaseous or phase while in the wellbore.

Abstract: A switch includes a casing having a bore, a piston assembly having a first end and an exposed end, a plurality of flanges formed at the first end; an insulating sleeve enclosing the first end, a contact assembly disposed in the casing bore; a pin disposed in the bore; a predetermined quantity of lubricant deposited in the bore; and a spring urging the pin into engagement with the piston assembly. The insulating sleeve and the plurality of flanges are at least partially disposed in the casing bore. The pin has: (i) a first position wherein the pin electrically contacts the piston assembly and is electrically isolated from the contact assembly; and (ii) a second position wherein the pin is electrically isolated from the piston assembly and electrically engages the contact assembly. The predetermined quantity of lubricant may be approximately 0.3 grams.

Abstract: Downhole stimulation devices include an energetic material disposed within a housing and an initiator for igniting the energetic material. The initiator may comprise a shaped charge configured to produce a projectile to penetrate the energetic material to ignite the energetic material. The housing of the device may comprise a continuous outer surface. Methods of operating a downhole stimulation device include initiating an energetic material disposed within a housing of the stimulation device in order to burn the energetic material in a laterally extending direction transverse to a depth of a borehole in which the stimulation device is disposed.